Query Results To Only Show ONE Result Per Locale

My query produces accurate results just produces one instance for each sales region. I am needing it to only give me one instance of each sales region and give me total counts. What should I re-write?

Code:
Select
salesmanname,
case when [state] IN ('GA', 'FL', 'AL', 'SC', 'NC', 'TN') Then 'South'
when [state] IN ('CA', 'NV', 'WA', 'OR', 'TX') Then 'West'
when [state IN ('NY', 'NJ', 'PA', 'DL', 'CT') Then 'NE'
end As [Sales Region]

[Code] ....